Analog ADP505x digital power controllers for isolated power converters

Analog Devices has introduced an integrated family of efficient power-management ICs aimed at compact, high-density power solutions for RF agile radio and FPGA/processor-based (field-programmable gate array) applications.

The ADP505x power management ICs were designed as an integrated power solution for picocell and femtocell base stations, portable and handheld devices as well as applications needing a compact, integrated power solution.

Designed to support the company’s AD9361 RF transceiver for software-defined radio (SDR) applications, the product can also be used as an integrated power solution for many of Altera’s and Xilinx’s FPGA platforms. It combines multiple buck regulators and LDOs (low-dropout regulators) into a single, compact 48-lead LFCSP (7 x 7 mm) package resulting in a power-density solution of up to 25 W in a 310 mm² PCB area.

It is a versatile multi-output regulator with four buck-switching regulators and one 200 mA LDO. The ADP5050 implements an I²C interface that allows the input voltage to the device and the die temperature to be monitored, increasing the power solution’s overall reliability. Its integrated design allows a single IC to be designed into many different applications, reducing power supply design time.

The ADP5050/51/52/53 two-high current buck regulators are resistor programmable using an external resistor to allow the power supply designer to quickly trim the current limit to 4, 2.5 or 1.2 A. All four switching regulators operate over a wide input voltage range (4.5 to 15 V) and are synchronised to a single clock with a wide programmable range (250 kHz to 1.4 MHz), which have programmable phase shifts on each buck regulator to reduce input ripple.